Three-piece watch-casing



L. LEHR.

TH REE PIECE WATCH CASING. APPLICATION man OCT. 1, 1921.

Patented Dec. 13, 1921.

PATENT OFFIQE.

LOUIS LEHR, OF BAYONNE, NEW JERSEY.

THREE-PIECE WATCH-CASING.

Specification of Letters Patent.

Patented Dec. 13, 19.21.

Application filed October 1, 1921. Serial No. 504,597.

To all whom it may concern:

Be it known that 1, Louis Lane, a citizen of the United States, residingat Bayonne,

county of Hudson, and State of New J ersey,

have invented certain new and useful improvements in Three-PieceWatch-Casings,

fully described and represented in the following specification and theaccompanying drawings, forming a part of the'same.

The present invention relates to a watchcasing formed in threeindependent parts, which are secured together by snap-joints so as torequire no hinges.

One object of the invention is to provide means for holding the movementin the casing with the front and the back of the movement bothaccessible to view; and another object is to provide means for excludingdust from the movement.

The invention is applicable towatch-casings of any shape, but isparticularly advantageous in connection with watch-cases having aso-callec fancy shape or outline, and in which a dial and crystal oftenhave the same outline as the fancy casing.

The term fancy is used herein to desig nate any shape other thancircular, as the improvements are equally applicable to all shapes.

The protection against dust is effected in the present invention byforming the body and the front with corresponding marginal flangeshaving the outline which distinguishes the design of the casing, so thatwhen these flanges are engaged the entire peripheryof the casing isguarded against the entrance of dust.

Furthermore, a dust-collar forms a part of the body into which themovement is snugly fitted, so as to prevent the access of dust to theedges of the movement. The rear cover of the casing is snapped upon abezel on the rear side of the body, and is easily removed when desired.I

The front is held to the body exclusively by the frictional "engagementof the two marginal flanges, which are made to fit one anotheraccurately. These and other details of construction will be understoodby reference to the annexed drawing, in which Figure 1 is a side view ofthe body with loops.

adapted to receive a wrist-strap; Fig. 2 shows the front side of thebody; Fig. 3 the rear side, and Fig. 4 the inner side of the front whichfits gainst the front side of the body. Fig. 5 shows the rear cover witha circular recess to snap upon the bezel on the body; Fig. 6 is atransverse section of the casing on line 6-6 in Fig. 2; Fig. 7 is alongitudinal section of the casing on line 7-7 in Fig. 2; and Fig. 8shows the lefthand side of the view in Fig. 6, but greatly enlarged toshow the details.

The margin of the body shown in Fig. 2 is of oblong fancy shape with amarginal flange a projected from one side, and a dustring or collar Z)attached to the flange by a plate 0, shown in Figs. 2 and 8. Owing tothe oblong form of the body, pockets (Z exist between the marginalflange at the ends of the body and the adjacent sides of the dustring.

The dust-ring is made a little smaller than the interior of the marginalflange a, leaving a space 6 between the two into which the flange f uponthe front f is snugly fitted, (see Fig. 4.)

The front is shown in Fig. 4 with a dialopening 9 of the same contour asthe body, so that the front consists merely'of a narrow frame which isengaged at its margin with the body, and its inner side with the crystalh, which is shown in Figs. 6, 7 and 8.

The dust-flange f, as shown in Fig. 8, fully protects the joints betweenthe frame of the front and the dust-ring.

The dust-ring is formed internally of two diameters with a shoulder i attheir junction, and the movement shown at j in Fig. 6 is shaped to fitthe said shoulder, which still further impedes the entrance of dust.

The rear side of the body is formed, as shown in Fig. 3, with abezel-projection 7c, and the rear cover Z is shown with a recess m,which is fitted to snap over the bezel I: to hold the rear cover inplace, as shown in Figs. 6 and 8.

In Fig. 8, the ring forming the bezel 7c is projected beyond the surfaceof the plate a, and the rim of the rear cover eXtends over the outerside of the bezel far enough to cover the joint of the back and thedustring,thus impeding the access of dust to the joint of the back at a.(See Fig. 8.)

The penetration of the flange f (upon the front) into the space 6 aroundthe dust-ring b, is clearly shown in Fig. 8, and furnishes a verycomplete barrier against the access of dust to the joint of the frontand the body.

Fig. 4 shows that the front is adapted to fully expose a dial of thesame fancy design as the body of the casing. V

The use of a marginal flange upon the body and a border flange upon thefront, are

' upon the body, and having a crystal-opening of any desired shape.

r 2; In a fancy watch-casing, the combination, with a body having aborder flange of the fancy outline and a circular flange withinthe samewlth intermediate space between dial, having a body with a border flangeof 7 them, of a front having a dust-flange of fancy outline to fit intothe said space, and a rear cover held upon the bodyby abezel. 3. In afancy watch-casing, the combination, with a body having a border flangeof the fancy outline and a circular dust-ring with intermediate spacebetween them, of a front having a dust-flange of the fancy out linetofit within the border flange of the body, and a rear cover held upon thebody by a bezel.

4:. A three-piece snap-casing for a fancy the fancy outline and acircular dust-ring within the same with intermediate space between them,a dial with fancy outline resting upon'the dust-ring, and a front havinga dust-flange of fancy outline to fit into the said intermediate space,and having a crystal-opening for a crystal of the-fancy shape.

5. A' three-piece snap-casing for a fancy dial having a body ofthe'fancy outline, a rear cover having a circular bezel-connection withthegbody' and a front having a dust-flange holding it upon the body andformed with a crystal-opening for a dial with the fancy outline. 1

l 6. A three-piece snap-casing for a fancy dial having a body of thefancy outline with a border flange upon the front side and a dust-collarwithin the same, a rear cover having a circular bezehconnection with thebody, :and a front having a dust-flange of fancy outline fitted betweenthe borderflange upon the body and the dust-ring, the dust-flangeextending across the joint between the front and the dust-ring toexclude dust from the saidring- 7. A three-piece snap-casing for afancy' dial having a body of the fancy outline with a border flange uponthe front side and a dust-ring within the same, forming pocketswhere'the fancy edge of the body projects outside of the collar, a rearcover iavi'ng'a circular bezel-connection with the body, and

a front having a dust-flange of the fancy outline fitted within'theborder flange upon the body and excluding dust from the said pockets,the front having a crystal-opening for a dial withthe fancy outline.

In testimony whereof I have hereunto set my hand. 1

Louis LEnnf

